Save batteries and stand-by power by getting a wind-up radio, you can get them in DAB and MP3 players too. I have a radio with a phone charger that I take camping, it is a bit noisy to wind up though!
I save batteries in my watch by using an automatic or self-winding watch, they cost more initially but will last a lifetime and never need a battery changing.
I have mentioned before about using electric toothbrushes, use them to save plastic over standard brushes, and use a rechargeable one to save more batteries.
When buying new torches or bike lights, go for LED ones. They tend to be brighter, last longer and you never have to change the bulb. The batteries will last much longer between recharges.
If you still have some single use batteries, when they are totally 'flat', Sainsbury's do a freepost envelope for battery recycling, so bag them up and send them off, save all the nasty chemicals going to landfill. If anyone knows of other places that do battery recycling, then perhaps you could leave me a comment?
Whilst in search of new green cleaning products (as Ecover is no longer vegan) I found out that if you mix Bicarb. of Soda with vinegar, then the fizzing will clean smelling drains. Bicarb is also great for cleaning out the fridge, dissolved in warm water. Use a little dry on burnt bits on pans and oven trays. Sprinkle on and leave for a while and then wipe off. Its kind to your skin unlike all those pungent smelling chemicals that don't break down in the environment!
Reduce Reuse Recycle!
Reduce what goes into landfill by selling unwanted items on ebay or at a car boot sale and make a little cash 
I find car boot sales great fun, but be prepared to barter. Donate saleable items to charity shops or use your local freecycle network. That's free and recycled (reused) not free-cycling
